Lexeme

 is a character in Bastard's Wound.

Background
Lexeme is a veteran Sage of the Vellum Citadel, Chronicler, and unfortunate victim of the Sleepless plague that Reef-Talon unwittingly brought on the Wound.

Quests

 * History of the Oldwalls: Part I: Finding Sage Lexeme is part of the mission - and she's actually the mysterious Sage L who invites you to the Wound.
 * History of the Oldwalls: Part II: Lexeme wants you to help persuade Reef-Talon to return to the Wound.
 * Truth and Reconciliation: She's one of the authors of the chronicles, and it soon becomes clear that something is amiss with the records.
 * Blood of the Beast, Bones of the Beast: She sics Lullaby at you as part of the quest(s).